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1. A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:
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By: guest on 01 Jun 2017 05.48 pm
Speed of the train relative to man = 125 m/sec 10 = 25 m/sec. 2 = 25 x 18 km/hr 2 5 = 45 km/hr. Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr. x - 5 = 45 x = 50 km/hr.